The main thing that makes me think about getting a smartphone is navigation. But I never lost the skill of "looking up/writing down directions before you go" so it's not too bad.
(My phone is technically Android, but really old, not a touchscreen, you can't install apps, and most websites don't work in it, so... basically a dumb phone. But I did write a map web page that works in my very specific situation: https://lab.brainonfire.net/classicmap/ But mostly I just look up directions first and pay attention to signs, and the web page is a fallback that's nice to have.)
(My phone is technically Android, but really old, not a touchscreen, you can't install apps, and most websites don't work in it, so... basically a dumb phone. But I did write a map web page that works in my very specific situation: https://lab.brainonfire.net/classicmap/ But mostly I just look up directions first and pay attention to signs, and the web page is a fallback that's nice to have.)